C172 PLT UNABLE TO SEE COMPLETE LENGTH OF RWY DUE TO RISE WHICH HIDES A GLIDER ON THE RWY. DEPARTS OVER THE GLIDER MISSING IT BY ABOUT 300 FT.

Narrative

WHILE TAXIING TO DO A RUNUP ON A TRAINING FLT; WE NOTICED A GLIDER ON MID RWY. THE COCKPIT WAS OPEN AND THE PEOPLE WERE OUT OF THE GLIDER. THE GLIDER HAD LANDED ABOUT 10 MINS EARLIER. THE RWY IS 6000 FT. WE TAXIED TO THE S END OF THE RWY. WE DID A RUNUP. IT HAD BEEN 15 MINS WHEN WE LAST SAW THE GLIDER. WE COULD NOT SEE THE MIDDLE OF THE RWY DUE TO THE RWY SLOPES. WE STARTED OUR TKOF ROLL AND NOTICED THE GLIDER WHEN WE ROTATED. I THINK THAT A DISPLACED THRESHOLD COULD HAVE PREVENTED THIS INCIDENT. I THOUGHT WE WERE LOOKING AT THE WHOLE RWY WHEN WE STARTED OUR TKOF. OR; A SIGN COULD BE PLACED TO WARN PLTS OF SUCH ILLUSIONS ON THIS RWY. CALLBACK CONVERSATION WITH RPTR REVEALED THE FOLLOWING INFO: RPTR STATED WHEN QUESTIONED THAT HE DID NOT SPEAK TO ANY ARPT PERSONNEL ABOUT THE INCIDENT BECAUSE THIS IS NOT HIS HOME BASE AND HE WAS JUST PASSING THROUGH THE AREA. ONCE HE WAS AIRBORNE AND SIGHTED THE GLIDER STILL ON THE RWY HE FELT IT SAFER TO CONTINUE RATHER THAN TOUCH DOWN AND USE HVY BRAKING TO AVOID CONTACT WITH THE GLIDER. THERE IS A RISE IN THE RWY WHICH DOES NOT ALLOW VISIBILITY OF THE ENTIRE RWY FROM THE S END. HE WAS UNAWARE OF THIS. HE CERTAINLY EXPECTED THE GLIDER WOULD HAVE BEEN REMOVED FROM THE RWY IN THE TIME IT TOOK TO TAXI; RUN UP; AND MAKE HIS 360 DEG TURN TO CHK FOR TFC IN THE PATTERN. RPTR WAS ADVISED OF THE FAA HOTLINE FOR FOLLOW-UP.